Clean up kernel unit tests (#938)

Author: WoosukKwon

tests/kernels/conftest.py

@@ -0,0 +1,43 @@
+from typing import List, Tuple
+
+import pytest
+import torch
+
+
+def create_kv_caches(
+    num_blocks: int,
+    block_size: int,
+    num_layers: int,
+    num_heads: int,
+    head_size: int,
+    dtype: torch.dtype,
+    seed: int,
+) -> Tuple[List[torch.Tensor], List[torch.Tensor]]:
+    torch.random.manual_seed(seed)
+    torch.cuda.manual_seed(seed)
+
+    scale = head_size**-0.5
+    x = 16 // torch.tensor([], dtype=dtype).element_size()
+    key_cache_shape = (num_blocks, num_heads, head_size // x, block_size, x)
+    key_caches = []
+    for _ in range(num_layers):
+        key_cache = torch.empty(size=key_cache_shape,
+                                dtype=dtype,
+                                device='cuda')
+        key_cache.uniform_(-scale, scale)
+        key_caches.append(key_cache)
+
+    value_cache_shape = (num_blocks, num_heads, head_size, block_size)
+    value_caches = []
+    for _ in range(num_layers):
+        value_cache = torch.empty(size=value_cache_shape,
+                                  dtype=dtype,
+                                  device='cuda')
+        value_cache.uniform_(-scale, scale)
+        value_caches.append(value_cache)
+    return key_caches, value_caches
+
+
+@pytest.fixture()
+def kv_cache_factory():
+    return create_kv_caches

tests/kernels/test_activation.py

@@ -1,72 +1,75 @@
+import pytest
 import torch
 import torch.nn.functional as F
 from transformers.activations import get_activation
+
 from vllm import activation_ops
 
+DTYPES = [torch.half, torch.bfloat16, torch.float]
+NUM_TOKENS = [7, 83, 2048]  # Arbitrary values for testing
+D = [512, 4096, 5120, 13824]  # Arbitrary values for testing
+SEEDS = [0]
+
 
 def ref_silu_and_mul(x: torch.Tensor) -> torch.Tensor:
     x1, x2 = x.chunk(chunks=2, dim=1)
     return F.silu(x1) * x2
 
 
+@pytest.mark.parametrize("num_tokens", NUM_TOKENS)
+@pytest.mark.parametrize("d", D)
+@pytest.mark.parametrize("dtype", DTYPES)
+@pytest.mark.parametrize("seed", SEEDS)
 @torch.inference_mode()
-def run_silu_and_mul(
+def test_silu_and_mul(
     num_tokens: int,
     d: int,
     dtype: torch.dtype,
+    seed: int,
 ) -> None:
+    torch.random.manual_seed(seed)
+    torch.cuda.manual_seed(seed)
     x = torch.randn(num_tokens, 2 * d, dtype=dtype, device='cuda')
     out = torch.empty(num_tokens, d, dtype=dtype, device='cuda')
     activation_ops.silu_and_mul(out, x)
     ref_out = ref_silu_and_mul(x)
     assert torch.allclose(out, ref_out, atol=1e-5, rtol=1e-5)
 
 
-def test_silu_and_mul() -> None:
-    for dtype in [torch.half, torch.bfloat16, torch.float]:
-        for num_tokens in [7, 83, 2048]:
-            for d in [512, 4096, 5120, 13824]:
-                print(f'Testing dtype={dtype}, num_tokens={num_tokens}, d={d}')
-                run_silu_and_mul(num_tokens, d, dtype)
-
-
+@pytest.mark.parametrize("num_tokens", NUM_TOKENS)
+@pytest.mark.parametrize("d", D)
+@pytest.mark.parametrize("dtype", DTYPES)
+@pytest.mark.parametrize("seed", SEEDS)
 @torch.inference_mode()
-def run_gelu_new(
+def test_gelu_new(
     num_tokens: int,
     d: int,
     dtype: torch.dtype,
+    seed: int,
 ) -> None:
+    torch.random.manual_seed(seed)
+    torch.cuda.manual_seed(seed)
     x = torch.randn(num_tokens, d, dtype=dtype, device='cuda')
     out = torch.empty(num_tokens, d, dtype=dtype, device='cuda')
     activation_ops.gelu_new(out, x)
     ref_out = get_activation("gelu_new")(x)
     assert torch.allclose(out, ref_out, atol=1e-5, rtol=1e-5)
 
 
-def test_gelu_new() -> None:
-    for dtype in [torch.half, torch.bfloat16, torch.float]:
-        for num_tokens in [7, 83, 2048]:
-            for d in [512, 4096, 5120, 13824]:
-                print(f'Testing dtype={dtype}, num_tokens={num_tokens}, d={d}')
-                run_gelu_new(num_tokens, d, dtype)
-
-
-@torch.inference_mode()
-def run_gelu_fast(
+@pytest.mark.parametrize("num_tokens", NUM_TOKENS)
+@pytest.mark.parametrize("d", D)
+@pytest.mark.parametrize("dtype", DTYPES)
+@pytest.mark.parametrize("seed", SEEDS)
+def test_gelu_fast(
     num_tokens: int,
     d: int,
     dtype: torch.dtype,
+    seed: int,
 ) -> None:
+    torch.random.manual_seed(seed)
+    torch.cuda.manual_seed(seed)
     x = torch.randn(num_tokens, d, dtype=dtype, device='cuda')
     out = torch.empty(num_tokens, d, dtype=dtype, device='cuda')
     activation_ops.gelu_fast(out, x)
     ref_out = get_activation("gelu_fast")(x)
     assert torch.allclose(out, ref_out, atol=1e-5, rtol=1e-5)
-
-
-def test_gelu_fast() -> None:
-    for dtype in [torch.half, torch.bfloat16, torch.float]:
-        for num_tokens in [7, 83, 2048]:
-            for d in [512, 4096, 5120, 13824]:
-                print(f'Testing dtype={dtype}, num_tokens={num_tokens}, d={d}')
-                run_gelu_fast(num_tokens, d, dtype)